Addons/arc/lz4

This lz4 addon requires lz4 binary library to encode and decode
lz4 raw and frame blocks.

For Linux, if lz4 had not been installed, then install it by

# Debian derivatives
$ sudo apt-get install lz4

# Redhat derivatives
$ sudo dnf install lz4

For Windows and Mac, lz4 binary is bundled with the addon.

See test1.ijs (~addons/arc/lz4/test1.ijs) for benchmark (and, thus, examples of use) with zlib.